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Old 04-27-2011, 12:53 AM   #1
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Default Gps Nmea数据格式意义

nmea数据如下:
$GPGGA,121252.000,3937.3032,N,11611.6046,E,1,05,2. 0,45.9,M,-5.7,Vibram five fingers uk,M,,0000*77
$GPRMC,121252.000,A,3958.3032,N,11629.6046,E,15.15 ,359.95,070306,,,A*54
$GPVTG,359.95,T,asics shoes online,,M,15.15,N,28.0,K,A*04
$GPGGA,121253.000,3937.3090,N,11611.6057,E,1,06,1. 2,44.6,M,-5.7,M,,0000*72
$GPGSA,A,3,14,15,05,22,18,26,,,,,,,2.1,1.2,1.7*3D
$GPGSV,3,1,10,18,84,067,23,09,67,067,27,22,49,312, 28,15,47,231,30*70
$GPGSV,3,2,10,21,32,199,23,14,25,272,24,05,21,140, 32,26,14,070,20*7E
$GPGSV,3,3,10,29,07,074,,30,07,163,28*7D
说明:NMEA0183格式以“$”开始,主要语句有GPGGA,GPVTG,GPRMC等
1、 GPS DOP and Active Satellites(GSA)当前卫星信息
$GPGSA,<1>,<2>,<3>,<3>,,,,,<3>,<3>,<3>,<4>,<5>,<6> ,<7><CR><LF>
<1>模式 :M = 手动, A = 自动。
<2>定位型式 1 = 未定位, 2 = 二维定位, 3 = 三维定位,Vibram Fivefingers Speed Black/Red Womens Shoes
<3>PRN 数字:01 至 32 表天空使用中的卫星编号,最多可接收12颗卫星信息。
<4> PDOP位置精度因子(0.5~99.9)
<5> HDOP水平精度因子(0.5~99.9)
<6> VDOP垂直精度因子(0.5~99.9)
<7> Checksum.(检查位).
2、 GPS Satellites in View(GSV)可见卫星信息
$GPGSV, <1>,<2>,<3>,<4>,<5>,<6>,<7>,?<4>,<5>,<6>,<7>,<8><C R><LF>
<1> GSV语句的总数
<2> 本句GSV的编号
<3> 可见卫星的总数,00 至 12。
<4> 卫星编号, 01 至 32。
<5>卫星仰角, 00 至 90 度。
<6>卫星方位角, 000 至 359 度。实际值。
<7>讯号噪声比(C/No), 00 至 99 dB;无表未接收到讯号。
<8>Checksum.(检查位).
第<4>,<5>,<6>,<7>项个别卫星会重复出现,每行最多有四颗卫星。其余卫星信息会于次一行出现 ,若未使用,这些字段会空白。
3、Global Positioning System Fix Data(GGA)GPS定位信息
$GPGGA,<1>,Onitsuka Tiger By Asics Mexico 66 Mens Shoes in Blue/White/Red,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,M,<10>,M,<11>,buy vibram five fingers,<12>*hh<CR><LF>
<1> UTC时间,hhmmss(时分秒)格式
<2> 纬度ddmm.mmmm(度分)格式(前面的0也将被传输)
<3> 纬度半球N(北半球)或S(南半球)
<4> 经度dddmm.mmmm(度分)格式(前面的0也将被传输)
<5> 经度半球E(东经)或W(西经)
<6> GPS状态:0=未定位,1=非差分定位,2=差分定位,6=正在估算
<7> 正在使用解算位置的卫星数量(00~12)(前面的0也将被传输)
<8> HDOP水平精度因子(0.5~99.9)
<9> 海拔高度(-9999.9~99999.9)
<10> 地球椭球面相对大地水准面的高度
<11> 差分时间(从最近一次接收到差分信号开始的秒数,如果不是差分定位将为空)
<12> 差分站ID号0000~1023(前面的0也将被传输,如果不是差分定位将为空)
4、Recommended Minimum Specific GPS/TRANSIT Data(RMC)推荐定位信息
$GPRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<1 1>,<12>*hh<CR><LF>
<1> UTC时间,hhmmss(时分秒)格式
<2> 定位状态,A=有效定位,V=无效定位
<3> 纬度ddmm.mmmm(度分)格式(前面的0也将被传输)
<4> 纬度半球N(北半球)或S(南半球)
<5> 经度dddmm.mmmm(度分)格式(前面的0也将被传输)
<6> 经度半球E(东经)或W(西经)
<7> 地面速率(000.0~999.9节,前面的0也将被传输)
<8> 地面航向(000.0~359.9度,以真北为参考基准,前面的0也将被传输)
<9> UTC日期,ddmmyy(日月年)格式
<10> 磁偏角(000.0~180.0度,前面的0也将被传输)
<11> 磁偏角方向,E(东)或W(西)
<12> 模式指示(仅NMEA0183 3.00版本输出,A=自主定位,D=差分,E=估算,N=数据无效)
5、 Track Made Good and Ground Speed(VTG)地面速度信息
$GPVTG,<1>,T,<2>,M,<3>,N,<4>,K,<5>*hh<CR><LF>
<1> 以真北为参考基准的地面航向(000~359度,前面的0也将被传输)
<2> 以磁北为参考基准的地面航向(000~359度,前面的0也将被传输)
<3> 地面速率(000.0~999.9节,前面的0也将被传输)
<4> 地面速率(0000.0~1851.8公里/小时,前面的0也将被传输)
<5> 模式指示(仅NMEA0183 3.00版本输出,A=自主定位,D=差分,E=估算,N=数据无效)
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